高抗冲PET/PC合金的相容性研究  

The Compatibility Study of High Impact PET/PC Alloy

作　　者：宋治乾 刘丹[2] 徐建荣 罗明华 辛敏琦 

机构地区：[1]上海锦湖日丽塑料有限公司,上海201107 [2]泛亚汽车技术中心,上海201201

出　　处：《塑料工业》2014年第5期29-34,共6页China Plastics Industry

摘　　要：以热塑性弹性体乙烯-1-辛烯共聚物(POE)或甲基丙烯酸缩水甘油酯(GMA)接枝POE(gPOE)作为改性剂,通过双螺杆反应挤出的方法制备聚对苯二甲酸乙二醇酯/聚碳酸酯(PET/PC)共混物。利用差示扫描(DSC)、动态热机械分析(DMA)、熔体质量流动速率(MFR)和扫描电子显微镜(SEM)等手段对PET/PC共混物的结晶性、相容性、加工性和相结构进行了表征。结果表明,gPOE添加量为15 phr时,共混物的缺口冲击强度为27.8 kJ/m2,是纯PET的6倍,断裂伸长率达到373%。相态研究显示共混物中大部分分散相粒子被拉伸变形,粒子周围基体凹凸不平,这是因为共混过程中PET的端羧基和gPOE的环氧基团之间可以发生反应,生成的接枝共聚物提高了组分之间的相容性,gPOE的加入同时解决了挤出过程中的出口膨胀现象,改善了加工性。By adding thermoplastic elastomers including POE or GMA grafted POE （gPOE）,PET/PC blends were prepared via twin screw reactive extrusion processing.By methods of DSC,DMA,MFR and SEM,the crystallinity,compatibility,processing behavior and phase morphology of PET/PC blends were characterized.The results indicated that the impact strength of PET/PC blend was 27.8 kJ/m2 by addition of 15 phr gPOE,which was about six times than that of the pure PET,and the elongation at break was increased to 373％,the dispersed phase were mostly stretched and the continues phase around became rough,which was the reason that the improved compatibility resulting from the copolymer by the reactions between end groups of PET and peroxide group of gPOE.Moreover,the blends with gPOE avoided the phenomenon named ＂extrusion expanding＂ and performed better processing behavior.

关 键 词：双螺杆反应挤出 聚对苯二甲酸乙二醇酯 甲基丙烯酸缩水甘油酯接枝乙烯-1-辛烯共聚物 相容性 

分 类 号：TQ320.1[化学工程—合成树脂塑料工业]